Sheet-metal rgof-joint



No. 749,943. PATENTED JAN. 19, 1904.

J. H. MQEVOY. SHEET METAL ROOF JOINT.

APPLICATION IILED MAY 29, 1903.

N0 MODEL.

Patented January 19, 1964.

UNITED. STA-Te s, PATENT OFFICE.

.JOSEPH MoEVOY, oF DAL LAs, TEXAS.)

.VSIHEIEITY-METJAL ROHOF-J'OIVNT,

SPECIFICATION forming part of Letters Patent No. 749,943, dated'January 19, 1904.

l v A u i fldMayaQ,19b3, Serial No 159,296. kilo model.) I I V r i I i To all whom it mag/concern} I I Be it known that I, J QSEPH H. MoEvoY, a citizen of the United States, residing at Dallas,

in the countyof Dallas, .State of.Texas,,have

.inventedcertain new and useful Improvements in Sheet-Metal Roof-Joints, of which the following is a specification, reference being had therein to the accompanyingdrawings.

This invention relates to a sheet-metal roofjoint, and particularly to an underlying. and overlapping joint between adjacent sheets of roofing material.

The invention has for an object to provide a roofing-sheet havingat its edges parallel ridges separated by flat securing portions, the ridges upon the opposite edges of each sheet being of different diameter transversly, so as to overlap or seat upon each other, while the body of the sheet is provided with an expansion-ridge to prevent any loosening of the joint by expansion or contraction.

Other and further objects and advantages will be hereinafter set forth, and the novel features of the invention defined by the appended claims.

In the drawings, Figure 1 is a perspective of the invention, showing adjacent ridges in position for assembling. Fig. 2is a vertical cross-section of the parts when assembled. Fig. 3 is a similar view showing the parallel ridges bent away from the expansion-ridge to form the locking-joint. Fig. 4-. is a modified form of the invention in which the locking-ridges are bent toward the expansionridge. Fig. 5 is a vertical section of the modified form of the invention wherein the expansion-ridge is disposed in the body of the sheet, while the locking-ridges are shown at the left in their assembled position and at the right in their interlocking position; and Fig. 6 is a vertical cross-section of a car-roof, showing the application of the roofing-sheet thereto. I

Like letters of reference refer to like parts in the several figures of the drawings. The letter A designates a roofing-sheet of any desired size, preferably of greater length than width, so as'to extend continuously across the roof of a car A, as shown in Fig. 6, and permit the ends of the sheet A to be bent allel to the locking-ridges.

downward and secured to the sides of the car,-

These sheets a re preferably about ten feet in length and thirty inches in width. Upon the opposite longitudinal edgespf each sheet the c ine-r sB ar p ovided, a d-t ose h n one edge-being of greater transverse dlfllll? eter. than upon" the other, so as to permit the.

uppermost sheet tooverlap the ridgesupon the underlyingv sheet. Between these :ridges the fiats'ec'uring portion B is provided through which a nail or other. securing means may be passed, as shown in Figs. 2 and 3, for the purpose of securing the sheet totherooftimber. Each of these sheets is also provided with an expansion-ridge extending par.-

For instance, as shown in Fig. 1, the expansion-ridge may be located between the locking-ridges at each edge of the sheet. When this expansion ridge is located at the point between the locking-ridges, it also performs an important function of preventing the entrance of water through the seam, even if the roof be flooded, as it would be necessary for thewater on the roof to rise and continue above the top of this ridge before any could leak or work its way through the joint. When the roofing-sheets are applied, one longitudinal edge of each sheet is secured to the foundation or the roofing-timber A as shown in Fig. 2, while the ridges upon the I opposite edge of this sheet are seated upon the corresponding ridges of the previously secured sheet extending parallel beneath the same. The lockin ridges are then bent downward upon the sheet to form a tight interlocking joint by means of which the free end of the sheet just applied is secured to the sheet 'previously fixed to the roof. This securing may be effected by bending the locking ridges away from the expansion-ridge, which is always leftstanding, as shown in Fig. 3, or bending toward the expansion-ridge, as shown in Fig. 4, in' which latter position they tend to support and strengthen the expansionridge. I

In the modified form of the'invention'which is shown in Fig. 5 the parallel locking-ridges B extend at opposite longitudinal edges of the sheet and are secured, as before described, by bending downward, as shown at the right the sheet is subjected in its exposed position owing to the extreme changes in temperature to which the car-roof is exposed in the travel of the car from point to point.

This invention is adapted for any use, but is particularly adapted for the roofs of box or other railway cars upon which it is essential to provide a thoroughly water-tight joint which will not be loosened by the expansion and contraction of the metal of the roof and which may be extended continuously from one side of the car to the other. Owing to the presence of brakemen upon the roof of the car it is also essential that the. joint be thoroughly interlocked and bent down upon the topiot' the sheet, so that it cannot be injured by the pressure incident to walking thereon and while the water-tight seam must be secured, which would prevent the entrance of moisture in the movement of the car which causes the rain to impinge laterally against the joint. The presence of the expansion ridge between the locking-ridges prevents the pulling apart of the seams and the buckling of the sheets, while it also prevents the entrance of water over or around the lockingridges if the latter become injured or are not 2. A sheet-metal roofing-joint comprising 45 a sheet having at one edge parallel ridges separated by flat securing portions, and an overlapping sheet having corresponding ridges seated upon the underlying ridges and bent downward upon the top of the sheet, and a standing expansion-ridge between the edge ridgesupon the underlying and overlapping sheets. i

In testimony whereof I aflix my signature in presence of two witnesses JOSEPH H. MoEVOY.

Witnesses:

Lnwrs M. DABNEY, C. M. ELMoRE. 

